在Spring中使用@Controller，@Service和@Inject MVC

Question

我有一個有一個服務的工作控制器，如下所示。

@Controller 
public class FileController 
{ 
    private FileService fileService;  // service injected by Spring 

    /** 
    * constructor which initializes the file service. 
    * @param fileService  service used to retrieve a list of files 
    */ 
    @Inject 
    public FileController(FileService fileService) 
    { 
     this.fileService = fileService; 
    } 

    ... 
} 

同樣，我有另一個服務，我也有工作和在另一個控制器中使用。

@Controller 
public class SearchController 
{ 
    private SearchService searchService;  // service injected by Spring 

    /** 
    * constructor which initializes the search service. 
    * @param searchService  service used to search for items 
    */ 
    @Inject 
    public SearchController(SearchService searchService) 
    { 
     this.searchService = searchService; 
    } 

    ... 
} 

兩種服務和控制器都工作正常。

然後，在開發過程中，原來FileController也需要搜索服務，所以我修改了FileController，如下所示。

@Controller 
public class FilesController 
{ 
    // data members 
    private FileService fileService;  // service injected by Spring 
    private SearchService searchService;  // service injected by Spring 

    /** 
    * constructor which initializes the file service. 
    * @param fileService  service used to retrieve a list of files 
    * @param searchService service used to retrieve a list of items. 
    */ 
    @Inject 
    public FilesController(FileService fileService, SearchService searchService) 
    { 
     this.fileService = fileService; 
     this.searchService = searchService; 
    } 
    ... 
} 

這編譯就好了部署就好了，但是當我訪問使用該FileController來看，它與春節錯誤炸燬：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping#0': Initialization of bean failed; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'filesController' defined in file [C:\rw_apps\tomcat\6.0.43-2\webapps\webquery\WEB-INF\classes\com\rockwell_collins\webquery\controller\FilesController.class]: Unsatisfied dependency expressed through constructor argument with index 1 of type [com.rockwell_collins.webquery.service.SearchService]: : Error creating bean with name 'searchService' defined in file [C:\rw_apps\tomcat\6.0.43-2\webapps\webquery\WEB-INF\classes\com\rockwell_collins\webquery\service\SearchService.class]: Instantiation of bean failed; nested exception is java.lang.ExceptionInInitializerError; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'searchService' defined in file [C:\rw_apps\tomcat\6.0.43-2\webapps\webquery\WEB-INF\classes\com\rockwell_collins\webquery\service\SearchService.class]: Instantiation of bean failed; nested exception is java.lang.ExceptionInInitializerError

是春天只能夠注入一個服務成控制器？ 我試過在我的spring xml文件中指定「default-autowire」，並嘗試了所有可能的值，但沒有任何效果。

Answer 1

SearchService的外觀如何？你有一些靜態塊嗎？